Mage Academy: I Have Infinite Skill Points - Chapter 264 - The Place of Seclusion

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.

An ordinary student, a wretched peeper, a cowardly teenager with a kind heart. In a terrorist attack, he inherited the knowledge of countless elites, embarked on a path of God Jagged Tu…

He is an artist!

He is a mathematician!

He is a psychology Doctor!

He is a master of fighting!

In fact, he is a man

Taken off raw site:

A wretched, dirty young man is working during the summer when he was caught up in a mysterious explosion. After that explosion, the young man is then left with the memories and knowledge of dozens of the world’s experts.

He has changed, his heart has become cold, iron-blooded. He became a killing machine, his mind turned mechanical, calculative. Everything goes according to his plans and calculations!

In this magical, slaughterous world, a door is opened for him…

- Description from Novelupdates

“Hey, hurry up and massacre those bandits!”

On the day Zhou Tian took up the ID of “Yuzhou” and joined the YGG team, the entire professional gaming society of League of Legends was whipped into a frenzy. Nobody foresaw that the number one Kindred player on the Korean server, “Yuzhou Mei” was really a girl, and was even playing as a professional gamer. And so, a few days later, during an interview with the YGG team after the competition, the interviewer asked their ADC, Xie Yi, to evaluate their new teammate.

Xie Yi, after seriously thinking for a while: “She’s a bit fierce.”

Xie Yi, later: “As the name suggests, the new jungler is the sweetest in the universe.”

Note: Yuzhou = Universe

- Description from Novelupdates